Automatic trimming knife device for conveyor belt calender

Abstract

The utility model belongs to the technical field of conveyer belt calendering equipment, and discloses an automatic trimming knife device for a conveyer belt calender. The two servo motors respectively drive the two sets of ball screws to respectively drive the cutters to move, and the cutters are aligned with the edges of the canvas; the two sets of infrared detectors are arranged on one side of the roller; the infrared detector is connected with the servo controller, and the servo controller is connected to the servo motor; the linear displacement sensor measures the moving value of the cutter. The servo motor is connected with the ball screw through a key and a coupler to transmit torque; the other end of the flange sleeve is fixed with the left mounting bracket; the two ends of the ball screw are supported and mounted in the left mounting bracket and the right mounting bracket through bearings respectively; and a nut on the ball screw is connected with a cutter. According to the device, the cutter always tracks the detection position constantly, it is guaranteed that the tracking position of the cutter is consistent with the position of the detected canvas, and therefore it is guaranteed that the edge of a cut film completely coincides with the edge of the canvas.

Description

Technical Field

[0001] This utility model relates to the technical field of conveyor belt calendering equipment, and in particular to an automatic edge-cutting knife device for a conveyor belt calender. Background Technology

[0002] Conveyor belts are rubber, fiber, and metal composite products used in belt conveyors to carry and transport materials. They are widely used in agriculture, coal mining, mining, metallurgy, construction, and transportation. Conveyor belt calenders are crucial equipment in conveyor belt production. The edge-cutting device is a major auxiliary device on the calender; its main function is to remove excess rubber edges during the fabric lamination process, ensuring neat edges to facilitate subsequent cutting and lamination processes.

[0003] Before the canvas is guided onto the calender for adhesive application, it travels over 20 meters, passing through a series of guide rollers and high-tension sections. If the tension on the two sides of the canvas is different, or if the parallelism of the guide rollers is off, the canvas will deviate during its entry into the calender roll gap. This necessitates that the edge-cutting blade move with the canvas edge to ensure that the cut edges of the upper and lower adhesive sheets are neatly aligned with the canvas edge. Previously, tire calenders used an inclined guide rod and counterweight structure for the edge-cutting blade, relying on gravity to press the blade against the edge of the fabric, which then pushes the blade forward. However, the canvas edge on the conveyor belt has a 3-5mm width without warp threads, making it impossible for the canvas to push the blade, thus rendering the conveyor belt adhesive application process unsuitable. Furthermore, the rolls of raw fabric purchased by conveyor belt manufacturers sometimes have inconsistent widths, with gaps between wide and narrow sections. Therefore, the automatic edge-cutting blade must accommodate these width variations during production.

[0004] With the goal of adapting to the canvas adhesive application process and ensuring trimming accuracy, we have independently developed an automatic edge-cutting device for conveyor belt calenders, enabling independent control of both sides of the canvas. Utility Model Content

[0005] The purpose of this invention is to design an automatic edge-cutting knife device for a conveyor belt calender, so as to realize the automatic edge-finding function of the edge-cutting knife with independent control on one side in the canvas adhesive application process, and ensure that the cut edge of the adhesive tape is neat.

[0006] The technical solution of this utility model is as follows: An automatic edge trimming knife device for a conveyor belt calender, comprising a servo motor 1, a cutter 2, an infrared detector 3, and a linear displacement sensor 4;

[0007] Two servo motors 1 drive two sets of ball screws 7 respectively, which in turn drive the cutter 2 to move. The cutter 2 is aligned with the edge of the canvas. Two sets of infrared detectors 3 are arranged on one side of the roller. The infrared detectors are connected to the servo controller, and the servo controller is connected to the servo motor 1. The linear displacement sensor 4 measures the movement value of the cutter 2.

[0008] The servo motor 1 and the ball screw 7 are connected by a key 11 and a coupling 12 to transmit torque; one end of the flange sleeve 13 is fixed to the servo motor 1, and the other end is fixed to the left mounting bracket 6; the two ends of the ball screw 7 are supported by bearings a5 and installed in the left mounting bracket 6 and the right mounting bracket 8 respectively; the nut on the ball screw 7 is connected to the cutter 2.

[0009] The cutter 2 includes a pin 14, a spacer sleeve 15, a retaining ring 16, a bearing b17, a blade 18, a bracket 19, a nut 20, and a spring pin 21. The pin 14 and the bracket 19 are connected and fixed by the nut 20 and the spring pin 21. The bearing b17 is mounted on the pin 14, and the spacer sleeve 15 and the retaining ring 16 are used to fix the bearing b17. The blade 18 is supported by the bearing b17. The blade 18 consists of two sets of circular blades with hardened cutting edges. Linear bearings 9 are installed on both sides of the bracket 19 for guidance. The ends of the linear bearings 9 are fixed by bearing seats 10.

[0010] The infrared detector 3 includes a servo motor 1, a fork sensor 22, a sliding pair 23, a linear guide rail 24, and a bracket; the fork sensor 22 is fixed on the sliding pair 23, and the servo motor 1 drives the sliding pair 23 to move left and right along the linear guide rail 24; the two ends of the linear guide rail 24 are fixed on the bracket; the fork sensor 22 sends the detection signal to the servo motor 1 that drives the cutter 2.

[0011] The distance L1 between the infrared detector 3 and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter 2, are given by L1+L2, which represents the path of the canvas from the infrared detector 3 to the blade of the cutter 2. Based on the working speed of the calender, the time from the detection point of the infrared detector 3 to the cutter 2 is calculated, and the servo motor 1 is delayed to ensure that the detection position of the canvas and the tracking position of the cutter 2 are consistent, thus ensuring neat cutting.

[0012] A method for using an automatic edge-cutting knife device for a conveyor belt calender, the working process of which is as follows:

[0013] The distance L1 between the infrared detector 3 and the center line of the roller, and the arc length L2 between the center line of the roller and the blade of the cutter 2 are measured. L1+L2 is the path that the canvas travels from the sensor to the blade. According to the working speed of the calender, the time from the detection point of the infrared detector 3 to the cutter 2 is calculated and delayed to ensure that the detection position of the canvas and the tracking position of the cutter are consistent, thus ensuring neat cutting.

[0014] First, the canvas width is set. The sliding pair 23 is driven by the servo motor 1, which moves the fork sensor 22 to the range that can be detected on both sides of the canvas. When the canvas deviates from the center of the calendering production line during the calendering process, the fork sensor 22 detects the position of the canvas edge and outputs the deviation value signal to the servo controller. The set signal and the actual signal are compared and calculated. Then, an electrical signal is output to the servo motor 1 that drives the cutter 2. At the same time, the servo controller receives the time signal that has elapsed from the detected canvas position to the cutter position and delays the start time of the servo motor 1 to always keep the cutter tracking the detected position. This ensures that the cutter tracking position is consistent with the detected canvas position, thereby ensuring that the edge of the cut film is completely overlapped with the edge of the canvas.

[0015] The beneficial effects of this invention are as follows: The device of this invention ensures that the cutter constantly tracks the detection position, guaranteeing that the cutting position matches the detected canvas position, thus ensuring that the edge of the cut film completely overlaps with the edge of the canvas. It achieves automatic edge-finding function for the cutting blade during the canvas adhesive application process. Furthermore, because two sets of cutters are independently controlled, it enables the tapering process where the original fabric width varies intermittently during production. Practical use has verified that the developed automatic cutting blade is suitable for the canvas adhesive application process on a conveyor belt calender and ensures trimming accuracy. Attached Figure Description

[0016] Figure 1(a) is a schematic diagram of the automatic edge trimming device used in a conveyor belt calender; Figure 1(b) is a schematic diagram of the device in use.

[0017] Figure 2 A schematic diagram of the servo drive section; (a) is a front view; (b) is a top view.

[0018] Figure 3 Schematic diagram of the cutting blade section.

[0019] Figure 4 Schematic diagram of an infrared detector.

[0020] In the diagram: 1-Servo motor; 2-Cutter; 3-Infrared detector; 4-Linear displacement sensor; 5-Bearing a; 6-Left mounting bracket; 7-Ball screw; 8-Right mounting bracket; 9-Linear bearing; 10-Support seat; 11-Key; 12-Coupling; 13-Flange sleeve; 14-Pin; 15-Spacing sleeve; 16-Retaining ring; 17-Bearing b; 18-Cutter; 19-Bracket; 20-Nut; 21-Spring pin; 22-Fork sensor; 23-Sliding pair; 24-Linear guide rail. Detailed Implementation

[0021] An automatic edge trimming device for a conveyor belt calender, as shown in Figure 1, mainly consists of a servo motor 1, a cutter 2, an infrared detector 3, and a linear displacement sensor 4.

[0022] Two servo motors 17 drive two sets of ball screws to move their respective cutters 2, enabling width adjustment and movement along the canvas edge. Two infrared detectors 3 detect the position of the canvas edges, and the detection signals are transmitted to the servo controller. After processing, the signals are converted into electrical signals and fed back to the servo motors 1. Upon receiving the signals, the servo motors 1 drive the ball screws 7 to move the cutters 2 along the canvas position, ensuring that the cutters 2 on both sides are aligned with the canvas edges. The cutter section uses double deep groove ball bearings to ensure that the cutters do not deflect during operation, thus ensuring cutting quality. A linear displacement sensor 4 displays the cutter movement value in real time on the main control panel screen.

[0023] The ball screw is driven by a servo motor, ensuring fast response and stable control, guaranteeing smooth cutter operation and sensitive fabric seeking. The servo drive section mainly consists of… Figure 2 The system consists of a servo motor 1, bearing a5, left mounting bracket 6, ball screw 7, right mounting bracket 8, linear bearing 9, support base 10, key 11, coupling 12, and flange sleeve 13. The servo motor 1 and ball screw 7 are connected by key 11 and coupling 12 to transmit torque. The left end of flange sleeve 13 is fixed to the servo motor 1, and the right end is fixed to the left mounting bracket 6. The left and right ends of ball screw 7 are supported by bearing a5, which is installed inside the left mounting bracket 6 and right mounting bracket 8. The nut on ball screw 7... Figure 3 The brackets 19 are fixed together, thereby driving Figure 3 The cutting blades move together.

[0024] The cutting blade 2 employs two sets of circular blades with hardened cutting edges. Two sets of deep groove ball bearings are installed on the blade shaft to prevent blade deflection during cutting and ensure cutting quality. The cutting blade 2 consists of... Figure 3 The device consists of a pin 14, a spacer sleeve 15, a retaining ring 16, a bearing b17, a blade 18, a bracket 19, a nut 20, and a spring pin 21. The pin 14 and bracket 19 are connected and fixed by the nut 20 and spring pin 21. The bearing b17 is mounted on the pin 14. The spacer sleeve 15 and retaining ring 16 are used to fix the bearing and prevent it from moving. The blade 18 is supported by the bearing.

[0025] The infrared detector 3 employs two sets of fork-type sensors 22, each driven by a servo motor 1 to move, continuously tracking the position of the canvas edge and sending detection signals to the servo motor 1 that drives the cutter 2. The infrared detector 3 mainly consists of... Figure 4 The system consists of a servo motor 1, a fork-type sensor 22, a sliding pair 23, and a support bracket. The fork-type sensor 22 is fixed on the sliding pair 23. The servo motor 1 drives the sliding pair 23 to move left and right along the linear guide rail 24, thereby causing the fork-type sensor 22 to move accordingly. The linear guide rail 24 is fixed on the left and right side supports.

[0026] Automatic edge trimming knife operation: First, measure the distance L1 between the infrared detector 3 and the roller centerline, and the arc length L2 between the roller centerline and the cutter blade 2. Then, L1 + L2 is the path of the canvas from the sensor to the blade. Based on the calender's operating speed, the time from the sensor detection point to the cutter is calculated in the program. The program performs a delay to always ensure that the canvas detection position and the cutter tracking position are consistent, ensuring a neat cut.

[0027] The automatic edge trimming blade consists of two independently controlled cutting blades. See the diagram for the structure of each set. Figure 2 As shown. (Through) Figure 2 Servo motor 1 drives ball screw 7, because Figure 3 The cutter is fixed to the ball screw and nut (the ball screw and nut are an integral set), thereby driving the cutter to move left and right. Figure 3 The cutter holder 19 is mounted on both sides. Figure 2 Linear bearing 9 acts as a guide, ensuring smooth operation of the cutter. Before operation, the canvas width is set, and then... Figure 4 Servo motor 1 drives sliding pair 23, which in turn moves fork sensor 22 to the detectable range on both sides of the canvas. When the canvas deviates from the center of the calendering production line during the calendering process... Figure 4 Fork-type sensor 22 detects the position of the canvas edge and outputs the deviation value signal to the servo controller. The controller compares the set and actual signals, performs calculations, and then outputs an electrical signal. Figure 2 Servo motor 1; simultaneously, the servo controller receives the time signal elapsed from detecting the canvas position to the cutter position, and delays... Figure 2 The servo motor 1 starts automatically, ensuring the cutter constantly tracks the detection position, guaranteeing that the cutter's tracking position matches the detected canvas position, thus ensuring the cut film edge perfectly overlaps with the canvas edge. This achieves automatic edge-finding for the cutting blade during the canvas adhesive application process. Furthermore, by employing two independently controlled cutters, it enables the tapering process where the original fabric width varies intermittently during production. Practical application verification has shown that the developed automatic cutting blade is suitable for canvas adhesive application on conveyor belt calenders, ensuring trimming accuracy.

Claims

1. An automatic edge-cutting device for a conveyor belt calender, characterized in that, The automatic edge trimming device for the conveyor belt calender includes a servo motor (1), a cutter (2), an infrared detector (3), and a linear displacement sensor (4); Two servo motors (1) drive two sets of ball screws (7) to move the cutter (2) and align the cutter (2) with the edge of the canvas; two sets of infrared detectors (3) are arranged on one side of the roller; the infrared detectors are connected to the servo controller, and the servo controller is connected to the servo motor (1); the linear displacement sensor (4) measures the movement value of the cutter (2).

2. The automatic edge-cutting device for a conveyor belt calender according to claim 1, characterized in that, The servo motor (1) is connected to the ball screw (7) via a key (11) and a coupling (12) to transmit torque; the servo motor (1) is fixed at one end of the flange sleeve (13), and the left mounting bracket (6) is fixed at the other end; the two ends of the ball screw (7) are supported and installed in the left mounting bracket (6) and the right mounting bracket (8) respectively by bearings a (5); the nut on the ball screw (7) is connected to the cutter (2).

3. The automatic edge-cutting device for a conveyor belt calender according to claim 1 or 2, characterized in that, The cutter (2) includes a pin (14), a spacer sleeve (15), a retaining ring (16), a bearing b (17), a blade (18), a bracket (19), a nut (20), and a spring pin (21); the pin (14) and the bracket (19) are connected and fixed by the nut (20) and the spring pin (21); the bearing b (17) is installed on the pin (14), and the spacer sleeve (15) and the retaining ring (16) are used to fix the bearing b (17); the blade (18) is supported by the bearing b (17); the blade (18) is two sets of circular blades, and the blade is hardened; linear bearings (9) are installed on both sides of the bracket (19) for guidance; the ends of the linear bearings (9) are fixed by bearing seats (10).

4. The automatic edge-cutting device for a conveyor belt calender according to claim 3, characterized in that, The infrared detector (3) includes a servo motor (1), a fork sensor (22), a sliding pair (23), a linear guide rail (24), and a bracket; the fork sensor (22) is fixed on the sliding pair (23), and the servo motor (1) drives the sliding pair (23) to move left and right along the linear guide rail (24); the two ends of the linear guide rail (24) are fixed on the bracket; the fork sensor (22) sends the detection signal to the servo motor (1) that drives the cutter (2).

Images